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Title: A method for measuring the corrosion rate of materials in spallation neutron source target/blanket cooling loops

Abstract

This paper summarizes the ongoing evaluation of the susceptibility of materials in accelerator target/blanket cooling loops to corrosion. To simulate the exposure environment in a target/blanket cooling loop, samples were irradiated by an 800 MeV proton beam at the A6 Target Station of the Los Alamos Neutron Science Center (LANSCE). To accomplish this, a cooling water loop capable of exposing corrosion samples to an 800 MeV proton beam at currents upwards of 1 mA was constructed. This loop allowed control and evaluation hydrogen water chemistry, water conductivity, and solution pH. Specially designed ceramic sealed samples were used to measure the real-time corrosion rates of materials placed directly in the proton beam using electrochemical impedance spectroscopy (EIS). EIS was also used to measure real-time corrosion rates of samples that were out of the proton beam and downstream from the in-beam samples. These out-of-beam probes primarily examined the effects of long lived water radiolysis products from proton irradiation on corrosion rates. An overview of the LANSCE corrosion loop, the corrosion probes, and data from an in-beam alloy 718 probe are presented.

Authors:
;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (US)
Sponsoring Org.:
USDOE
OSTI Identifier:
20020752
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Journal Article
Journal Name:
Materials Characterization
Additional Journal Information:
Journal Volume: 43; Journal Issue: 2-3; Other Information: PBD: Aug-Sep 1999; Journal ID: ISSN 1044-5803
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 36 MATERIALS SCIENCE; 45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; LINEAR ACCELERATORS; ACCELERATOR FACILITIES; COOLING SYSTEMS; INCONEL 718; WATER CHEMISTRY; CORROSION; RADIOLYSIS; CORROSIVE EFFECTS; MEASURING METHODS

Citation Formats

Lillard, R.S., and Butt, D.P. A method for measuring the corrosion rate of materials in spallation neutron source target/blanket cooling loops. United States: N. p., 1999. Web. doi:10.1016/S1044-5803(99)00030-3.
Lillard, R.S., & Butt, D.P. A method for measuring the corrosion rate of materials in spallation neutron source target/blanket cooling loops. United States. doi:10.1016/S1044-5803(99)00030-3.
Lillard, R.S., and Butt, D.P. Wed . "A method for measuring the corrosion rate of materials in spallation neutron source target/blanket cooling loops". United States. doi:10.1016/S1044-5803(99)00030-3.
@article{osti_20020752,
title = {A method for measuring the corrosion rate of materials in spallation neutron source target/blanket cooling loops},
author = {Lillard, R.S. and Butt, D.P.},
abstractNote = {This paper summarizes the ongoing evaluation of the susceptibility of materials in accelerator target/blanket cooling loops to corrosion. To simulate the exposure environment in a target/blanket cooling loop, samples were irradiated by an 800 MeV proton beam at the A6 Target Station of the Los Alamos Neutron Science Center (LANSCE). To accomplish this, a cooling water loop capable of exposing corrosion samples to an 800 MeV proton beam at currents upwards of 1 mA was constructed. This loop allowed control and evaluation hydrogen water chemistry, water conductivity, and solution pH. Specially designed ceramic sealed samples were used to measure the real-time corrosion rates of materials placed directly in the proton beam using electrochemical impedance spectroscopy (EIS). EIS was also used to measure real-time corrosion rates of samples that were out of the proton beam and downstream from the in-beam samples. These out-of-beam probes primarily examined the effects of long lived water radiolysis products from proton irradiation on corrosion rates. An overview of the LANSCE corrosion loop, the corrosion probes, and data from an in-beam alloy 718 probe are presented.},
doi = {10.1016/S1044-5803(99)00030-3},
journal = {Materials Characterization},
issn = {1044-5803},
number = 2-3,
volume = 43,
place = {United States},
year = {1999},
month = {9}
}